CN103173630B - Electroslag remelting furnace - Google Patents

Electroslag remelting furnace Download PDF

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Publication number
CN103173630B
CN103173630B CN201310069507.8A CN201310069507A CN103173630B CN 103173630 B CN103173630 B CN 103173630B CN 201310069507 A CN201310069507 A CN 201310069507A CN 103173630 B CN103173630 B CN 103173630B
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CN
China
Prior art keywords
crystallizer
support arm
cylinder
electroslag remelting
arm
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Expired - Fee Related
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CN201310069507.8A
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Chinese (zh)
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CN103173630A (en
Inventor
向大林
辜荣如
谈家宝
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Zhejiang Electroslag Nuclear Material Co ltd
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Zhejiang Electroslag Nuclear Material Co ltd
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Priority to CN201310069507.8A priority Critical patent/CN103173630B/en
Publication of CN103173630A publication Critical patent/CN103173630A/en
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Publication of CN103173630B publication Critical patent/CN103173630B/en
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Abstract

The invention relates to an electroslag remelting furnace. The invention aims at providing to an electroslag remelting furnace with which three-phase power supply is adopted. With the electroslag remelting furnace, double arm electrodes are replaced in turn, and the double arms work alternately. The electroslag remelting furnace comprises an elevation platform and a platform elevation device used for driving the elevation platform to move up and down. A motorized flatcar is arranged on the elevation platform. A crystallizer is arranged on the top of the motorized flatcar. Two columns are arranged beside the platform elevation device. A cross arm is arranged on the upper part of each column. The cross arms and the columns are connected through connection devices. The connection device comprises a rotation device which can drive the cross arms to rotate around the axes of the columns, and an elevation device which can move along an axial direction of the columns. Fixture heads used for fixing electrodes are arranged at free ends of the cross arms. The electroslag remelting furnace has the advantages that: network load is balanced, and interference is low; electroslag ingot uniformity and compactness are improved; the furnace is suitable for the productions of large-tonnage and large-size metal materials, especially electroslag ingots with 10-150 tons, which are used in high-end large forgings such as nuclear power main pipes, reactor internals, ultra-supercritical rotors, and the like.

Description

Electroslag remelting furnace
Technical field
The present invention relates to a kind of electroslag smelting equipment, relate in particular to a kind of electroslag remelting furnace.
Background technology
The high-parameters of the heavy Large-Scale Equipment such as energy project, petrochemical industry project, metallurgical engineering, large capacity development, make Quality of Large Forgings performance requriements more and more higher, and the metallurgical quality of steel ingot is basis and the prerequisite that obtains heavy forging, in producing, heavy forging plays key effect.Heavy forging Huge value, one is worth millions of and even tens million of units.Electroslag technology has the functions such as strong refining purification and controlled rapid solidification concurrently, few and the small and dispersed of the pure inclusion of ESR ingot quality, the even degree of segregation of composition is little, and dense structure is without coagulation defects such as loose shrinkage cavities, produces heavy forging with esr process, not only the high scrap rate of reliability is few, and steel ingot utilization ratio is high, steel ingot weight used is little, and forging and stamping fire is inferior few simultaneously, thermal treatment is simplified, and has unique technology, quality and economic advantages.In order to ensure Quality of Large Forgings, the rate of reducing the number of rejects and seconds and metal consumption, increase economic efficiency, and large-scale esr process is more and more favored.
Chinese patent notification number CN102031388A discloses a kind of 450 tons of electroslag remelting furnaces, comprises stand column device, transverse arm, lifting gantry, electric flat carriage, crystallizer; Stand column device comprises three root posts, and every root post is provided with a transverse arm, and the coupling end of transverse arm is connected with the top of column by transverse arm coupling device, and the free end of transverse arm is provided with terminal clamp, and terminal clamp is fixed on transverse arm electrode; Transverse arm is provided with transverse arm lifting device and transverse arm turning device; In the space that three root posts surround, be provided with lifting gantry, the bottom of lifting gantry and column is slidably connected; Lifting gantry is provided with platform lifting device, and platform lifting device drives lifting gantry to move up and down; On lifting gantry, be provided with electric flat carriage, electric flat carriage top is provided with water cooled bottom plate, and crystallizer is arranged on water cooled bottom plate.These 450 tons of electroslag remelting furnaces adopt stack crystallizer method, and it adopts three-phase bipolar series and three transformers respectively to three transverse arm single phase power supplies, the operation simultaneously of three transverse arm holding electrodes, and structure is more complicated, changes electrode more frequent; The lifting gantry of crystallizer is consistent with three column centers, whole factory building excessive height.
Chinese patent notification number CN202139283U discloses a kind of Combined type electroslag remelting furnace, comprise column swivel arrangement, be arranged on the electrode lifting device on column swivel arrangement and be positioned at the crystallizer of electrode lifting device below, described crystallizer is fixed crystallizer or stripping formula crystallizer, the below of described electrode lifting device is provided with crystallizer dolly, column, crystallizer lifting device and anchor, described crystallizer dolly is vertically movably arranged on column by lifting device, described crystallizer is positioned on crystallizer dolly, crystallizer is connected with described anchor.This Combined type electroslag remelting furnace has been cancelled the design of three columns, and crystallizer is arranged in melt pit, has reduced factory building height, but does not relate to replacing electrode design.
Summary of the invention
The object of the invention is to provides a kind of three phase supply for solving the problem existing in background technology, both arms take turns to change electrode, the electroslag remelting furnace of alternation, special production high-performance, long lifetime, eco-friendly high technology content, high added value, large-tonnage, large-sized metallic substance is particularly with main nuclear power pipeline, in-pile component, ultra supercritical rotor etc. is main high-end heavy forging material, comprise generation Ⅲ nuclear power AP1000 to meet, ACP1000, ACPR1000, CAP1400, CAP1700 is at interior main pipeline, the needs of ESR ingot and 40 tons of-100 tons of generous slabs of naval vessels substance for the high-end heavy forging such as in-pile component and 1000MW-1300MW ultra supercritical rotor, strengthen the supportability to the great demand of country.
To achieve these goals, technical scheme of the present invention is: a kind of electroslag remelting furnace, comprise lifting gantry and the platform lifting device that drives lifting gantry to move up and down, on lifting gantry, be provided with electric flat carriage, motor-driven flatcar top is provided with crystallizer, described platform lifting device is provided with two root posts on one side, every root post top is provided with a transverse arm, described transverse arm is connected by coupling device with column, described coupling device comprises and can drive transverse arm around the turning device of column axis rotation and along the axially movable lifting device of column, the free end of described transverse arm is provided with the chuck for holding electrode.The design philosophy of this technical scheme is: design two columns, on each column, transverse arm is set, chuck is set on transverse arm, chuck is for holding electrode, the wait of working of two transverse arms one, and a transverse arm job is complete, by turning device displacement installing electrodes again, another transverse arm moves the working order that enters in place by turning device, and it is reasonable that this electroslag remelting furnace changes electrode structural designs, improved working efficiency.
As preferably, described chuck comprises pedestal and is connected on described pedestal three support arm side by side in same level, and each support arm end is equipped with an electrode holder, is also provided with the drive unit that drives corresponding support arm top electrode folder to open and close on each support arm.Three electrode holders are set on the chuck of one transverse arm, can reduce electrode length, reduce factory building height.
As preferably, described electrode holder comprises a fixing part and a movable part, described fixing part comprises the annulus with a breach, and described movable part one end is articulated with breach one end of annulus, and described drive unit is for driving movable part to open and close the breach of described annulus.Electrode holder is for holding electrode.
As preferably, described drive unit comprises cylinder, and one end of cylinder is provided with piston rod, and the end of piston rod drives described movable part to swing the breach that opens and closes annulus by bar linkage structure.The drives structure of this design is simple and reliable.
As preferably, the support arm and the pedestal that are positioned at position, both sides are hinged, hinge is vertical direction setting, between the support arm of position, both sides and the support arm in mid-way, be all connected with bar linkage structure, be positioned on the support arm of position, both sides and be all hinged with cylinder, one end of cylinder is provided with piston rod, and the end of piston rod connects bar linkage structure, a flexible arm swing that can drive position, both sides of piston rod.
As preferably, the support arm that is positioned at mid-way is scalable.This electroslag remelting furnace can be produced the electroslag ingot of 10~150 tons of weights, and its diameter range, between 1300~2200mm, is designed to middle support arm scalable, and capable of regulating electrode position, makes three electrodes roughly uniform within the scope of steel ingot.
As preferably, the support arm that is positioned at mid-way comprises fixed part and slipper, and described fixed part is fixed muffle, and described slipper is sliding cylinder, the internal diameter adaptation of the external diameter of sliding cylinder and fixed muffle.
As preferably, middle electrode holder is located at sliding cylinder outside end, drives the cylinder of target folder to be located on the inwall of sliding cylinder.This is intended to make electrode holder and cylinder all with sliding cylinder interlock, thereby ensures effective switching of electrode holder.
As preferably, between described two columns, be provided with a three-phase transformer, the outlet line of three-phase transformer is connected with all electrode holders.Adopt three phase supply mode, single phase power supply or many transformer-supplied modes relatively, high-power networking balancing the load, disturb little, in mains supply radius, the arbitrary voltage range of high-pressure side satisfies condition lower power transmission and distribution equipment simply at load, economical and practical less investment.
As preferably, described crystallizer comprises crystallizer, lower crystallizer and is located at the bell at crystallizer top, and described upper crystallizer is up-small and down-big, and described lower crystallizer is up big and down small, the detachable connection in upper end of the lower end of described upper crystallizer and lower crystallizer.Crystallizer is the consistent or up-small and down-big tubular structure with tapering of upper and lower diameter traditionally, after in it, steel ingot is shaped, is difficult for departing from steel ingot when lifting crystallizer.The crystallizer of this patent is designed to the upper and lower crystallizer of the little olivary built-up type broad in the middle in two, be conducive to improve bottom and the top quality of ESR ingot, be conducive to the solidification Control in reflow process, improve homogeneity and the density of whole ESR ingot, after steel ingot is shaped, first rise and hang on crystallizer, then lift by crane out steel ingot, the smooth and easy safety of lifting work.
The beneficial effect of electroslag remelting furnace of the present invention is:
1. this electroslag remelting furnace is powered by a Three-Phase Transformer, and high-power networking balancing the load disturbs littlely, and in mains supply radius, the arbitrary voltage range of high-pressure side is simple at the load lower power transmission and distribution equipment that satisfies condition, economical and practical less investment;
2. electrode structure multi-electrode remelting design are changed in liang column one after the other, both made electrode prepare simple and easy to do, be easy to ensure the high quality of electrode, and made again the stroke of stove short, frame is exquisite small and exquisite, reduce factory building height, also reduce short net length, improve electrical efficiency, particularly, can also utilize bogey to produce the remelting of many stoves electrode and produce large steel ingot, this design economical rationality, efficiency and benefit are all very high;
3. the little olivary four plate mold broad in the middle in two designs, and is conducive to improve bottom and the top quality of ESR ingot, is conducive to the solidification Control in reflow process, improves homogeneity and the density of whole ESR ingot, is conducive to lift the demoulding.
Brief description of the drawings
Fig. 1 is the front view of electroslag remelting furnace of the present invention;
Fig. 2 is the side-view of electroslag remelting furnace of the present invention;
Fig. 3 is the vertical view of electroslag remelting furnace of the present invention;
Fig. 4 is chuck closure state schematic diagram;
Fig. 5 is chuck open mode schematic diagram;
Fig. 6 is pendulum schematic diagram in support arm;
Fig. 7 is that support arm is put schematic diagram outward;
Fig. 8 is the structural representation of crystallizer.
Number in the figure is respectively: 10. 52. times crystallizers of crystallizer, 53. bell 60. three-phase transformer 70. factory building supports on motor-driven flatcar 50. crystallizers 51 of column 20. transverse arm 21. coupling device 22. chuck 221. pedestal 222. support arm 223. cylinder 224. fixing part 225. movable part 30. lifting gantry 31. platform lifting device 40..
Embodiment
Also by reference to the accompanying drawings technical scheme of the present invention is further described specifically below by embodiment.
Embodiment:
A kind of electroslag remelting furnace, as shown in Figures 1 to 8, comprise lifting gantry 30 and the platform lifting device 31 that drives lifting gantry 30 to move up and down, on lifting gantry 30, be provided with motor-driven flatcar 40, motor-driven flatcar 40 tops are provided with crystallizer 50, described platform lifting device 31 is provided with two root posts 10 on one side, every root post 10 tops are provided with a transverse arm 20, described transverse arm 20 is connected by coupling device 21 with column 10, described coupling device comprises and can drive transverse arm 20 around the turning device of column 10 axis rotations and along the axially movable lifting device of column, the free end of described transverse arm 20 is provided with the chuck 22 for holding electrode, described chuck 22 comprises pedestal 221 and is connected on described pedestal 221 three support arm 222 side by side in same level, each support arm 222 ends are equipped with an electrode holder, described electrode holder comprises a fixing part 224 and a movable part 225, described fixing part comprises the annulus with a breach, described movable part one end is articulated with breach one end of annulus, on each support arm 222, be also provided with the drive unit that drives corresponding support arm 222 top electrode folders to open and close, described drive unit comprises cylinder 223, one end of cylinder 223 is provided with piston rod, the end of piston rod drives described movable part 225 to swing the breach that opens and closes annulus by bar linkage structure.
The support arm 222 that is positioned at mid-way is scalable, and the support arm that is positioned at mid-way comprises fixed part and slipper, and described fixed part is fixed muffle, and described slipper is sliding cylinder, the internal diameter adaptation of the external diameter of sliding cylinder and fixed muffle.
The support arm 222 that is positioned at position, both sides is hinged with pedestal 221, hinge is vertical direction setting, between the support arm 222 of position, both sides and the support arm 222 in mid-way, be all connected with bar linkage structure, be positioned on the support arm 222 of position, both sides and be all hinged with cylinder, one end of cylinder is provided with piston rod, the end of piston rod connects bar linkage structure, a flexible arm swing that can drive position, both sides of piston rod, the radius of circle that the electrode holder of such three support arms forms is adjusted within the specific limits, to adapt to products of different specifications demand, guarantee to produce the ESR ingot within the scope of 10 tons to 150 tons.Middle electrode holder is located at sliding cylinder outside end, drives the cylinder of target folder to be located on the inwall of sliding cylinder.
10, described two column is provided with a three-phase transformer 60, and the outlet line of three-phase transformer 60 is connected with all electrode holders.
Described crystallizer 50 comprises crystallizer 51, lower crystallizer 52 and is located at the bell 53 at crystallizer 51 tops, described upper crystallizer 51 is up-small and down-big, described lower crystallizer 52 is up big and down small, and the upper end of the lower end of described upper crystallizer 51 and lower crystallizer 52 is that groove and tognue type is connected.
In order to reduce factory building height, the below of described platform lifting device is provided with melt pit, and described platform lifting device 31, lifting gantry 30, motor-driven flatcar 40 and crystallizer 50 are all arranged in melt pit.
Column 10 is fixedly connected with factory building support 70, when work, clamps three electrodes on a transverse arm, the wait of working of two transverse arms one, and a transverse arm job is complete, and by turning device displacement installing electrodes again, another transverse arm moves the working order that enters in place by turning device.
Above-mentioned described specific embodiment is only that design of the present invention is done to preferable examples explanation.All any amendments of making within the spirit and principles in the present invention or supplement or be equal to alternative, within all should being included in the protection domain of the claims in the present invention.

Claims (1)

1. an electroslag remelting furnace, comprise lifting gantry and the platform lifting device that drives lifting gantry to move up and down, on lifting gantry, be provided with motor-driven flatcar, motor-driven flatcar top is provided with crystallizer, it is characterized in that: described platform lifting device is provided with two root posts on one side, every root post top is provided with a transverse arm, described transverse arm is connected by coupling device with column, described coupling device comprises and can drive transverse arm around the turning device of column axis rotation and along the axially movable lifting device of column, and the free end of described transverse arm is provided with the chuck for holding electrode;
Described chuck comprises pedestal and is connected on described pedestal three support arm side by side in same level, and each support arm end is equipped with an electrode holder, is also provided with the drive unit that drives corresponding support arm top electrode folder to open and close on each support arm;
Described electrode holder comprises a fixing part and a movable part, and described fixing part comprises the annulus with a breach, and described movable part one end is articulated with breach one end of annulus, and described drive unit is for driving movable part to open and close the breach of described annulus;
Described drive unit comprises cylinder, and one end of cylinder is provided with piston rod, and the end of piston rod drives described movable part to swing the breach that opens and closes annulus by bar linkage structure;
The support arm and the pedestal that are positioned at position, both sides are hinged, hinge is vertical direction setting, between the support arm of position, both sides and the support arm in mid-way, be all connected with bar linkage structure, be positioned on the support arm of position, both sides and be all hinged with cylinder, one end of cylinder is provided with piston rod, the end of piston rod connects bar linkage structure, a flexible arm swing that can drive position, both sides of piston rod;
The support arm that is positioned at mid-way is scalable;
The support arm that is positioned at mid-way comprises fixed part and slipper, and described fixed part is fixed muffle, and described slipper is sliding cylinder, the internal diameter adaptation of the external diameter of sliding cylinder and fixed muffle;
Middle electrode holder is located at sliding cylinder outside end, drives the cylinder of target folder to be located on the inwall of sliding cylinder;
Between described two columns, be provided with a three-phase transformer, the outlet line of three-phase transformer is connected with all electrode holders;
Described crystallizer comprises crystallizer, lower crystallizer and is located at the bell at crystallizer top, and described upper crystallizer is up-small and down-big, and described lower crystallizer is up big and down small, the detachable connection in upper end of the lower end of described upper crystallizer and lower crystallizer;
The below of platform lifting device is provided with melt pit, and platform lifting device, lifting gantry, motor-driven flatcar and crystallizer are all arranged in melt pit.
CN201310069507.8A 2013-03-06 2013-03-06 Electroslag remelting furnace Expired - Fee Related CN103173630B (en)

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CN103173630B true CN103173630B (en) 2014-07-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109897937A (en) * 2017-12-07 2019-06-18 江苏天工工具有限公司 Process the electroslag remelting mechanism of high-speed steel
CN108950230B (en) * 2018-08-20 2019-11-08 东北大学秦皇岛分校 A kind of electroslag remelting process and its electrode replacing options
CN112536428B (en) * 2020-12-04 2022-07-15 东北特殊钢集团股份有限公司 Production method of phi 1600 mm-phi 1850mm large-scale stripping electroslag ingot

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693699A (en) * 1969-06-17 1972-09-26 Boehler & Co Ag Geb Arrangement for electroslag remelting of metals and, in particular, steel
CN101418374A (en) * 2008-11-24 2009-04-29 江阴兴澄特种钢铁有限公司 Conductive and continuous casting type electroslag remelting furnace for crystallizer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693699A (en) * 1969-06-17 1972-09-26 Boehler & Co Ag Geb Arrangement for electroslag remelting of metals and, in particular, steel
CN101418374A (en) * 2008-11-24 2009-04-29 江阴兴澄特种钢铁有限公司 Conductive and continuous casting type electroslag remelting furnace for crystallizer

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